https://bugs.llvm.org/show_bug.cgi?id=42299
Bug ID: 42299
Summary: Should warn for __attribute__((pcs("aapcs-vfp"))) when
target does not have floating-point
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
If you take the following:
__attribute__((pcs("aapcs-vfp")))
float add1(float a, float b) {
return a + b;
}
__attribute__((pcs("aapcs")))
float add2(float a, float b) {
return a + b;
}
and compile with --target=arm-none-eabi -mcpu=cortex-m3 then both functions are
generated with the aapcs pcs as the cortex-m3 doesn't have floating-point.
We should be giving a warning that pcs("aapcs-vfp") is being ignored. Looks
like ARMTargetInfo::checkCallingConvention is probably the place to do this.
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